GT4 Performance Springs

GT4 Swift Spring upgrade kit: Upgrade your stock springs to 448lb in front and 560lbs in the rear! These spring rates have shown to reduce camber loss during cornering and can improve tire wear while on track. Fortunately the factory OEM shocks are capable of handling these stiffer springs without the need to revalve. Stiffer spring rates are also needed to handle higher aerodynamic loads. These springs will help compensate for the increased loads.  This Swift Springs upgrade Kit includes 2 front springs and 2 rear springs along with helper springs for the rear. We chose to use a longer front spring without helper springs so we can increase the amount of usable stroke in the front suspension by 1/2" when compared to other spring kits for the GT4.  Swift's innovative designs have made us a staple in the performance tuning world. Our products are the result of over 90 years of experience in industrial spring manufacturing. Our engineers have spent countless hours developing and re-develo